I think I would advise against a direct mirroring -- instead, I'd do sync-every-24-hours or something similar. Both schemes are vulnerable to the (admittedly r

I think I would advise against a direct mirroring -- instead, I'd do sync-every-24-hours or something similar. Both schemes are vulnerable to the (admittedly rarer) errors where both drives fail simultaneously (e.g. mobo fried them) or are just ... destroyed by a fire or whatever. A periodic sync (while harder to set up) will occasionally save you from the deleting the wrong files which mirroring doesn't. Either way: Any truly important data (family photos/videos, etc.) needs to be saved periodically to remote storage. There's no getting around that if you really care about the data.